Research On Seismic Capacity Of Water Supply Network And Earthquake Disaster Risk Assessment

With the development of urbanization in our country and the rapid development of infrastructure construction,water supply pipe networks have spread throughout cities and towns,and are responsible for the important function of ensuring industrial water and residential water.At the same time,the increase in the size of the city has increased its vulnerability,and the consequences of disasters such as earthquakes have become more serious.Once the water supply pipe network fails,it will not only affect the emergency rescue work,but may also cause serious secondary disasters.The earthquake disaster risk assessment of urban water supply pipelines provides a reference for engineering earthquake prevention before the earthquake,and provides a location reference for the formulation of emergency rescue measures after the earthquake.This work helps the risk management department to formulate practical risk management and control measures,and build an urban earthquake disaster prevention system that is compatible with economic development.This article has consulted the relevant literature,combined with the earthquake disaster risk theory,the functional characteristics of the water supply pipe network structure,the modeling analysis method and the computer language.Taking the urban water supply pipe network encountering an earthquake as the disaster background,the seismic capacity and earthquake disaster risk of the urban water supply pipe network are evaluated in a refined manner,and the seismic capacity and earthquake disaster risk evaluation program of the water supply pipe network is developed based on python.The specific work content and research results are as follows:First,an evaluation model for the comprehensive seismic capacity of the water supply network was established.The main factors affecting the seismic capacity of the pipeline unit and the pipe network system are analyzed,and an evaluation index system for the seismic capacity of the water supply pipe network is constructed.Based on historical seismic damage data,the principal component analysis method is used to obtain the index weights,and the seismic capacity evaluation model of the water supply pipeline is established.With the help of graph theory,an evaluation model of the foundation seismic capacity of the water supply network is established.The environmental evaluation correction coefficients of the social and time effect dimensions are proposed,and a refined evaluation model of the comprehensive seismic capacity of the water supply network and the classification standard are constructed.The comparison between the results of the seismic capacity evaluation and the traditional earthquake damage prediction shows the rationality of the evaluation model.Secondly,an earthquake disaster risk assessment model for the water supply network was established.The constituent elements of the earthquake disaster risk of the water supply network are analyzed,combined with the earthquake resistance evaluation model established above,the original natural disaster risk index model is improved,and the earthquake disaster risk evaluation model of the water supply network is proposed.Based on the risk acceptance criteria and comprehensively considering the level of frequent,occasional and rare earthquakes,a quantitative and qualitative combination of quantitative and qualitative seismic comprehensive risk classification standards for urban water supply networks has been formulated.An earthquake disaster risk assessment model for the water supply pipeline network based on loss expectations was established,and the assessment results of the above two models were compared.Finally,a comprehensive evaluation program of water supply network based on python is developed.The earthquake resistance and risk evaluation modules are built based on the python language,and the visualization modules are built based on the html,css,and Java Script languages.The implementation process of the functions and the use steps of the program are described in detail.Combining with examples of spatial information resources of Shenzhen’s water supply pipe network,calculate and analyze the seismic capacity of water supply pipe sections and water supply pipe network,as well as the magnitude of the earthquake disaster risk of water supply pipe network,and synchronize the calculation results to the visualization module for display.The dynamic changes of the seismic capacity and risk of the water supply pipeline network over time are analyzed by modifying the relevant parameters of the pipeline.